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Q. A firefighter of mass 135 kg slides down a vertical pole with an acceleration of 4 m/s2. What is the friction force that acts on the firefighter?
A man weighing 650 and a woman weighing 440 have same momentum. What is the ratio of the man's kinetic energy to that of the woman.
If the activation energy for the vacancy formation is given as 0.77 eV for aluminium at (650 degrees Celcius) ^3, what would be the number of vacancies at 650 degrees Celsius? The atomic weight and the density of aluminium is 26.98 g/mol and 2.62 ..
What stage of the scientific method would someone be at if they make a prediction that drinking alcohol will make people more violent throughout a sporting event.
What is the magnetic field strength. Consider a ladder 5 meters tall, and a 150 kg weight on top of it. The ladder is leaning against the wall.
A 53 kg skier skis directly down a frictionless slope angled at 12° to horizontal. Choose the positive direction of the x axis to be downhill along the slope.
What is the maximum tension. The gastrocnemius muscle, in the back of the leg, has two portions, known as the medial and lateral heads. Assume that they attach to Achilles tendon. The cross-sectional area of each of these two muscles is typically f..
A motorcycle and a police car are moving toward one another. The police car emits sound with a frequency of 532 and has a speed of 25.5. The motorcycle has a speed of 12.50. What frequency does the motorcyclist hear in this case?
what common temperature must the two pieces be heated.
if ellis is on earth, mario is on mars and monique is on the moon. they all have a mass of 50kg. they all jump off a trampoline. who will jump the highest. find what is the Tension T2 in the left.
An air-filled capacitor is formed from two long conducting cylindrical shells that are coaxial and have radii of 37 mm and 92 mm. The electric potential of the inner conductor regarding the outer conductor is -574 V.
One displacement vector A has magnitude of 2.78 km and point due north. Another displacement vector B has a magnitude of 7.40 km and also points due north. Provide diagrams and calculate the magnitude and direction of A+B, B-A, A-B.
A sailboat is running along a straight course with the wind providing a constant force of 55 lb. The only other force acting on the boat is resistance as the boat moves through the water. The resisting force is numerically equal to five times the boa..
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